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References to 'Heyting algebra'
1. Brouwerian lattice by CWoo
2. index of categories by bci1
3. Lindenbaum-Tarski algebra by CWoo
4. locale by CWoo
5. quantum electrodynamics by bci1
6. quantum logic toposes by bci1
7. quantum topos by bci1
8. residuated lattice by CWoo
9. variable groupoid by bci1